made some changes by reformatting Jimmy branch:
- separated splitter and dumbbell
- separated benchmark
- projects shall be just links to the projects, missing links
- tutorial has a link to another dumbbell_calibration
refactored the jimmy516 branch
- reduced the table of contents
- apidoc doesn't work from pyptv_gui - needs ATTENTION
Merge pull request #2 from alexlib/jimmy516-master

refactored pull request